The Board grants authority to the Superintendent or designee to pay claims accruing against the District during periods between board meetings, the payment of such claims being necessary to the proper conduct of the schools. It is understood that claims shall be prepared in the regular manner and checks issued in payment therefore upon certification of delivery of merchandise, completion of services, and/or contractual obligations as authorized by the Board of Trustees and to be signed by the treasurer or assistant treasurer of the District and countersigned by the chair or vice-chair of the Board of Trustees. [Idaho Code 33-701 (1)]